Lamp.



G. R. IVIcKAY.

LAMP.

APPLICATION YILED JAN. 2, 1917.

Patented July 3, 1917.

GUY R. MCKAY, OF PARK CITY, UTAH.

LAMP.

Application filed January 27, 1917.

To all whom 'it may concern:

Be it known that I, GUY R. MGKAY, a citizen of the United States, residing at Park City, in the county of Summit and State of Utah, have invented a certain new and useful Improvement in Lamps, of which the following is a full, clear, and exact description.

The object of this invention is to provide a lamp especially useful as a back sight lamp in mine and tunnel or other underground surveying.

Without thereby limiting the invention, but in order to furnish a concrete example illustrating the same, the invention may be stated to consist of a gas generator from which the gas is supplied to a burner, the generator and burner being capable of being suspended preferably in a self-leveling manner and the burner protected from contact of outside water, as I will proceed now to explain and finally claim.

In the accompanying drawings illustrating the invention, in the several figuresof which like parts are similarly designated,

Figure lr is a view haltl in elevation and half in longitudinal section, illustrating one enibodiment of the invention. Fig. 2 is a top plan view of the generator with the cover and gas tube removed. Fig. 3 is a crosssection taken substantially in the plane of line A B, Fig. l. Fig. 4 is an elevation of the upper end of the generator turned a quarter way around from Fig. 1 and having the outside parts broken away adjacent to the excitant distributer and to expose it.

|llhe casing may be of metal, made in two parts, l and 2, and divided at 3 where the parts may be detachably secured in any suitable manner, as by a screwthreaded joint. The portion l is adapted to receive the material from which the gas that is to be burned in the burner is generated, and as calcium carbid affords a convenient material for this purpose, I prefer to use the perforated shell 4 to contain the carbid, this container 4 preferably being open at its lower end 5 and having its upper end 6 closed, except for perforations for the escape of the gas generated. The upper section 2 has the bottom 7 formed with screwthreaded seat 8 in which is screwed the gas tube 9, and this gas tube preferably is made with a tapered portion l0 coperating with a similarly shaped portion of the seat 8 and adapted to open and close ducts ll Specification of Letters Patent.

Patented July 3, 491i l?. Serial No. 144,915.

extending through the bottom 7. The section 2 is supplied with water or other fluid adapted to act upon the gas-forming agent 1n section l to liberate the gas, and this agent escapes through the ducts ll into the section l under the control of' the tapered portion 10 of the gas tube 9. In order to effect the proper distribution of the iiuid there is a distributer flange l2 extending :from the bottom 7 below the seat 8 and into the section 1, on which the fluid escaping through the ducts l1 from the section 2 drops, and is thence distributed downwardly. In order to insure the distribution of the fluid and prevent it from crawling up under the distributer, said distributer may be provided with any suitable collecting points or elements, such as a pair of wires 13 arranged on the distributer opposite each duct 1l, the upper portions of the wires being divergent so as to insure the reception of the water from the ducts and thence converging and extending down over the edge of the distributer. The distributer and its wires are so disposed with relation to the container 4 as to discharge the fluid along the periphery rather than upon the upper portion of the container, so that the iiuid will attack the gas-forming agent in the bottom of the container 4 first and thus prevent the formation of a dense layer of burned carbid at the top which would hinder the free passage of water into the carbid below and also hinder the escape of the gas formed below this layer. Thus the evolution of gas may proceed evenly and certainly until the charge is exhausted. The distributer and its wires in addition to contributing to the prevention of the water from working under the distributer serve to prevent the clogging of the mouth of the gas tube 9.

It will be observed that the tapered portion l0 of the gas tube is above and independent of the screwthreaded portion by which the gas tube is secured in the bottom 7 and by which it may be adjusted, so that the tube retains a fluid-tight fit in its seat irrespective of the relation of the tapered portion 10 to the ducts 1l. The ducts therefore may be opened without liability of the escape of the :fluid in the part 2 past the screw threaded portion, and equally withoutliability of the gas escaping upwardly.

The separation of the body of the lamp at the point designated permits access to the sections for cleaning purposes and for renewal of the gas-orming agent.

The section 2 is provided with a cap 14,

Applied to the section 2, in any suitable manner, is a giniba-l 17 having links 1S to which are attached chains or other suspending means 19 which are secured to rings 20 on the hood 21 provided with means, such as a hook 22, by which the lamp may be suspended from the roof or timbers overhead in such way as to insure its perpendicularity. The hood 21 also serves the additional purpose of preventing falling water from dropping upon the burner.

The lower point of the casing is tapered, as at 23, so that the lamp may be used as a plummet. Some mining-engineers carry their survey points in the floor instead of in the roof or timbers, and with a lamp of this character provided with the conical bottom, it can be suspended accurately over the point.

When the lamp is not in use the tube 9 is screwed down so that its tapered portion 10 will close the ducts and thus prevent the escape of the exciting fluid into part 1 and the consequent generation of gas. The reverse movement of the tube admits the water to part 1.

The lamp thus furnishes a self-illuminating back sight lamp, and dispenses with the service of one man in an underground surveying party.

Variations in details of' construction are permissible within the scope of the invention as hereinafter claimed.

What I claim is y 1'. A lamp ofthe character described, having a two-part casing the parts of which are detachably connected, one of the parts containing a gas-forming agent and the other part containing a gas-excitant and provided with a bottom having ducts for the escape of the excitant, a distributer flange extending from said bottom and upon which suoli chiots discharge, said distributer flange extending below the bottom and into the part containing, the gasforming agent, and a gas tube adjustably fixed in the bottom and controlling the ducts and forming a gas outlet for the part containing the gas-V forming agent.

2. A back sight lamp of the character described, having atwo-part casing the parts of' which are detachably connected, one of the parts containing a gas-forming agent and the other part containing a gas-excitant and provided with a bottom having ductsV for the escape of the excitant, and a screwtlireaded seat, a gas tube screwthreadedto engage said seat and having a tapered portion to coperate with said ducts7 and a distributer arranged below the bottom and ex tending intothe gas-.forming part.

3. A back sight lamp, having a two-part casing the parts of which are detachably connected, one ofV the parts containing a gas-forming agent and the other part containing a gasexcitant and provided with a bottom having ducts for the escape of they excitant,4 a distributer on which such chiots discharge, said distributer extending below the bottom and into the gas-forming part, and a gas tube adjustably arranged in the bottom and controlling the ducts, said distributer having convergent wires arranged thereon opposite the f ducts to control the distribution of the excitant.

In testimony whereof I have hereunto set inyhand this 19th day of January A. D.- 1917.v Y Y GUY R. MCKAY. Witnesses: l W: GFARNLAGHER,

Gnnnvinvn CHERRY MGKAY.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. Q. 

